我想写一个绘图程序以用于平板电脑。为此,我需要在压力下使用降落和透明度。所以我使用C#中的位图系统进行图像构建。C#位图绘图不能渲染到屏幕
我似乎无法得到我的绘图代码在此刻显示任何东西。它正在呈现给一个图片框。我知道有一些东西被输入到位图中,就像我在做位图保存时显示的那样。
我有围绕一看几乎所有的C#绘图问题,请参阅使用画线或椭圆形绘图的东西,而不是位图
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace paint1
{
public partial class Form2 : Form
{
public Bitmap m_bitmap;
public bool m_penDown;
public int m_lastX;
public int m_lastY;
public int m_currentX;
public int m_currentY;
public Form2()
{
InitializeComponent();
// Create the bitmap area
m_bitmap = new Bitmap(this.Width, this.Height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
m_penDown = false;
Graphics m_graphics = Graphics.FromImage(m_bitmap);
m_lastX = System.Windows.Forms.Cursor.Position.X;
m_lastY = System.Windows.Forms.Cursor.Position.Y;
m_currentX = System.Windows.Forms.Cursor.Position.X;
m_currentY = System.Windows.Forms.Cursor.Position.Y;
}
private void Form2_Load(object sender, EventArgs e)
{
}
private void Form2_Paint(object sender, PaintEventArgs e)
{
Graphics objGraphics;
//You can't modify e.Graphics directly.
objGraphics = e.Graphics;
// Draw the contents of the bitmap on the form.
objGraphics.DrawImage(m_bitmap, 0, 0,
m_bitmap.Width,
m_bitmap.Height);
objGraphics.Dispose();
}
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
m_penDown = true;
}
private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
m_penDown = false;
}
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
m_lastX = m_currentX;
m_lastY = m_currentY;
m_currentX = System.Windows.Forms.Cursor.Position.X;
m_currentY = System.Windows.Forms.Cursor.Position.Y;
if(m_penDown)
m_bitmap.SetPixel(m_currentX, m_currentY, Color.Gray);
}
private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
Form2_Paint(sender, e);
this.pictureBox1.Image = m_bitmap;
}
private void Form2_KeyUp(object sender, KeyEventArgs e)
{
if (e.KeyCode == Keys.Space)
{
m_bitmap.Save(@"C:\Users\rpettefar\Documents\My Dropbox\Programming\paint1\preview.bmp", System.Drawing.Imaging.ImageFormat.Bmp);
}
}
}
}
我有点新的C#,所以我很开放也可能引起您的注意。
谢谢你。无效的图片框似乎很好地画出:D – Pyro